a first housing including a first side facing a first direction, a second side facing a second direction opposite to the first direction, and a first lateral side surrounding at least part of a space between the first side and the second side, wherein the first lateral side includes a first conductive portion and a first non-conductive portion;

a second housing including a third side facing a third direction, a fourth side facing a fourth direction opposite to the third direction, a second lateral side surrounding at least part of a space between the third side and the fourth side and a ground member, wherein the second lateral side includes a second conductive portion and a second non-conductive portion;

a flexible display disposed in the first housing and the second housing;

a connecting member which connects the first housing and the second housing such that the first housing and the second housing are folded to face each other, wherein when the first housing and the second housing are folded, the first non-conductive portion and the second non-conductive portion abut against each other;

at least one wireless communication circuit electrically connected to the first conductive portion; and

at least one switching circuit disposed in the second housing,

wherein the at least one switching circuit is electrically connected between the second conductive portion and the ground member such that the second conductive portion can be selectively connected to the ground member,

wherein the first lateral side forms at least a part of an exterior of the electronic device, and

wherein, when the first housing and the second housing are folded to face each other, the at least one switching circuit is configured to electrically connect the second conductive portion and the ground member.